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EP 2 438 772 A2

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(88) Date of publication A3: 17.02.2011 (43) Date of publication: 11.04.2012 Bulletin 2012/15 (21) Application number: 10783945.8 (22) Date of filing: 01.06.2010

(51) International Patent Classification (IPC):  H04W 4/20(2009.01) H04W 8/20(2009.01) (86) International application number: PCT/US2010/036939 (87) International publication number: WO 2010/141495 (09.12.2010 Gazette 2010/49)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR (30) Priority: 02.06.2009 US 476870 (71) Applicant: Microsoft Corporation Redmond, Washington 98052-6399 (US)	(72) Inventors: SABOTTA, Kenneth Q. Redmond, Washington 98052-6399 (US) GUNTAUR, Paula Redmond, Washington 98052-6399 (US) PAN, David T. Redmond, Washington 98052-6399 (US) (74) Representative: Fischer, Michael Maria et al Olswang Germany LLP Maximilianstraße 13 80539 München 80539 München (DE)